package com.kunda.netty.http;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;
import io.netty.handler.stream.ChunkedWriteHandler;

public class HttpFileServer {
	public static final String DEFAULT_URL = "/src/main/java";
	
	public void run(final int port,final String url) throws Exception{
		EventLoopGroup bossGroup = new NioEventLoopGroup();
		EventLoopGroup workGroup = new NioEventLoopGroup();
		try{
			ServerBootstrap bootstrap = new ServerBootstrap();
			bootstrap.group(bossGroup,workGroup)
			         .channel(NioServerSocketChannel.class)
			         .childHandler(new ChannelInitializer<SocketChannel>() {

						@Override
						protected void initChannel(SocketChannel ch) throws Exception {
							ch.pipeline().addLast("http-decoder",new HttpRequestDecoder());
							ch.pipeline().addLast("http-aggregator",new HttpObjectAggregator(65536));
							ch.pipeline().addLast("http-encoder",new HttpResponseEncoder());
							ch.pipeline().addLast("http-chunked",new ChunkedWriteHandler());
							ch.pipeline().addLast("fileServerHandler",new HttpFileServerHandler(url));
						}
			        	 
			         });
			
			ChannelFuture future = bootstrap.bind(port).sync();
			future.channel().closeFuture().sync();
			
		}finally{
			bossGroup.shutdownGracefully();
			workGroup.shutdownGracefully();
				
		}
		
	}
	
	public static void main(String[] args) throws Exception{
		int port = 8080;
		new HttpFileServer().run(port, DEFAULT_URL);
	}
}
